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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:船舶工程学院院长、党委副书记
其他任职:船舶工程学院院长
性别:男
毕业院校:新加坡国立大学
学位:博士
所在单位:船舶工程学院
学科:船舶与海洋结构物设计制造
办公地点:船舶工程学院(船池楼)313房间
联系方式:0411-84706985
电子邮箱:gyzhang@dlut.edu.cn
Tuning the resonance properties of 2D carbon nanotube networks towards a mechanical resonator
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论文类型:期刊论文
发表时间:2015-08-07
发表刊物:NANOTECHNOLOGY
收录刊物:SCIE、EI、Scopus
卷号:26
期号:31
ISSN号:0957-4484
关键字:nanotube; resonance property; natural frequency; quality factor
摘要:The capabilities of the mechanical resonator-based nanosensors in detecting ultra-small mass or force shifts have driven a continuing exploration of the palette of nanomaterials for such application purposes. Based on large-scale molecular dynamics simulations, we have assessed the applicability of a new class of carbon nanomaterials for nanoresonator usage, i.e. the single-wall carbon nanotube (SWNT) network. It is found that SWNT networks inherit excellent mechanical properties from the constituent SWNTs, possessing a high natural frequency. However, although a high quality factor is suggested from the simulation results, it is hard to obtain an unambiguous Q-factor due to the existence of vibration modes in addition to the dominant mode. The nonlinearities resulting from these extra vibration modes are found to exist uniformly under various testing conditions including different initial actuations and temperatures. Further testing shows that these modes can be effectively suppressed through the introduction of axial strain, leading to an extremely high quality factor in the order of 109 estimated from the SWNT network with 2% tensile strain. Additional studies indicate that the carbon rings connecting the SWNTs can also be used to alter the vibrational properties of the resulting network. This study suggests that the SWNT network can be a good candidate for applications as nanoresonators.